THE NMR RELAXATION MECHANISMS OF O17 IN AQUEOUS SOLUTIONS OF PARAMAGNETIC CATIONS AND THE LIFETIME OF WATER MOLECULES IN THE FIRST COORDINATION SPHERE

摘要

The data for cupric ion were interpreted in terms of six coordinated water molecules in a distorted octahedron, with a ratio of ca. 10 5 existing for the axial water exchange rate over that of the equatorial waters. The rates of exchange were compared with other physical measurements and the nature of the bonding was considered.n17 The results of the 0 ' MR studies were compared with the results of proton NMR studies of the same systems in order to derive additional infor-mation.